2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
5 Copyright (C) 2010 Google Inc.
7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License version 2 as
11 published by the Free Software Foundation;
13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
16 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
17 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
18 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
24 SOFTWARE IS DISCLAIMED.
30 #include <asm/unaligned.h>
31 #include <linux/atomic.h>
34 #define L2CAP_DEFAULT_MTU 672
35 #define L2CAP_DEFAULT_MIN_MTU 48
36 #define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
37 #define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF
38 #define L2CAP_DEFAULT_TX_WINDOW 63
39 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
40 #define L2CAP_DEFAULT_MAX_TX 3
41 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
42 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
43 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */
44 #define L2CAP_DEFAULT_ACK_TO 200
45 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
46 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
47 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
48 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */
49 #define L2CAP_LE_MIN_MTU 23
51 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
52 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
53 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
54 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
55 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
56 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
57 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
59 #define L2CAP_A2MP_DEFAULT_MTU 670
61 /* L2CAP socket address */
63 sa_family_t l2_family;
70 /* L2CAP socket options */
71 #define L2CAP_OPTIONS 0x01
72 struct l2cap_options {
82 #define L2CAP_CONNINFO 0x02
83 struct l2cap_conninfo {
89 #define L2CAP_LM_MASTER 0x0001
90 #define L2CAP_LM_AUTH 0x0002
91 #define L2CAP_LM_ENCRYPT 0x0004
92 #define L2CAP_LM_TRUSTED 0x0008
93 #define L2CAP_LM_RELIABLE 0x0010
94 #define L2CAP_LM_SECURE 0x0020
95 #define L2CAP_LM_FIPS 0x0040
97 /* L2CAP command codes */
98 #define L2CAP_COMMAND_REJ 0x01
99 #define L2CAP_CONN_REQ 0x02
100 #define L2CAP_CONN_RSP 0x03
101 #define L2CAP_CONF_REQ 0x04
102 #define L2CAP_CONF_RSP 0x05
103 #define L2CAP_DISCONN_REQ 0x06
104 #define L2CAP_DISCONN_RSP 0x07
105 #define L2CAP_ECHO_REQ 0x08
106 #define L2CAP_ECHO_RSP 0x09
107 #define L2CAP_INFO_REQ 0x0a
108 #define L2CAP_INFO_RSP 0x0b
109 #define L2CAP_CREATE_CHAN_REQ 0x0c
110 #define L2CAP_CREATE_CHAN_RSP 0x0d
111 #define L2CAP_MOVE_CHAN_REQ 0x0e
112 #define L2CAP_MOVE_CHAN_RSP 0x0f
113 #define L2CAP_MOVE_CHAN_CFM 0x10
114 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
115 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
116 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
117 #define L2CAP_LE_CONN_REQ 0x14
118 #define L2CAP_LE_CONN_RSP 0x15
119 #define L2CAP_LE_CREDITS 0x16
121 /* L2CAP extended feature mask */
122 #define L2CAP_FEAT_FLOWCTL 0x00000001
123 #define L2CAP_FEAT_RETRANS 0x00000002
124 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
125 #define L2CAP_FEAT_ERTM 0x00000008
126 #define L2CAP_FEAT_STREAMING 0x00000010
127 #define L2CAP_FEAT_FCS 0x00000020
128 #define L2CAP_FEAT_EXT_FLOW 0x00000040
129 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
130 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
131 #define L2CAP_FEAT_UCD 0x00000200
133 /* L2CAP checksum option */
134 #define L2CAP_FCS_NONE 0x00
135 #define L2CAP_FCS_CRC16 0x01
137 /* L2CAP fixed channels */
138 #define L2CAP_FC_SIG_BREDR 0x02
139 #define L2CAP_FC_CONNLESS 0x04
140 #define L2CAP_FC_A2MP 0x08
141 #define L2CAP_FC_ATT 0x10
142 #define L2CAP_FC_SIG_LE 0x20
143 #define L2CAP_FC_SMP_LE 0x40
145 /* L2CAP Control Field bit masks */
146 #define L2CAP_CTRL_SAR 0xC000
147 #define L2CAP_CTRL_REQSEQ 0x3F00
148 #define L2CAP_CTRL_TXSEQ 0x007E
149 #define L2CAP_CTRL_SUPERVISE 0x000C
151 #define L2CAP_CTRL_RETRANS 0x0080
152 #define L2CAP_CTRL_FINAL 0x0080
153 #define L2CAP_CTRL_POLL 0x0010
154 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
156 #define L2CAP_CTRL_TXSEQ_SHIFT 1
157 #define L2CAP_CTRL_SUPER_SHIFT 2
158 #define L2CAP_CTRL_POLL_SHIFT 4
159 #define L2CAP_CTRL_FINAL_SHIFT 7
160 #define L2CAP_CTRL_REQSEQ_SHIFT 8
161 #define L2CAP_CTRL_SAR_SHIFT 14
163 /* L2CAP Extended Control Field bit mask */
164 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
165 #define L2CAP_EXT_CTRL_SAR 0x00030000
166 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
167 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
169 #define L2CAP_EXT_CTRL_POLL 0x00040000
170 #define L2CAP_EXT_CTRL_FINAL 0x00000002
171 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
173 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1
174 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
175 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
176 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
177 #define L2CAP_EXT_CTRL_POLL_SHIFT 18
178 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
180 /* L2CAP Supervisory Function */
181 #define L2CAP_SUPER_RR 0x00
182 #define L2CAP_SUPER_REJ 0x01
183 #define L2CAP_SUPER_RNR 0x02
184 #define L2CAP_SUPER_SREJ 0x03
186 /* L2CAP Segmentation and Reassembly */
187 #define L2CAP_SAR_UNSEGMENTED 0x00
188 #define L2CAP_SAR_START 0x01
189 #define L2CAP_SAR_END 0x02
190 #define L2CAP_SAR_CONTINUE 0x03
192 /* L2CAP Command rej. reasons */
193 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
194 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
195 #define L2CAP_REJ_INVALID_CID 0x0002
197 /* L2CAP structures */
202 #define L2CAP_HDR_SIZE 4
203 #define L2CAP_ENH_HDR_SIZE 6
204 #define L2CAP_EXT_HDR_SIZE 8
206 #define L2CAP_FCS_SIZE 2
207 #define L2CAP_SDULEN_SIZE 2
208 #define L2CAP_PSMLEN_SIZE 2
209 #define L2CAP_ENH_CTRL_SIZE 2
210 #define L2CAP_EXT_CTRL_SIZE 4
212 struct l2cap_cmd_hdr {
217 #define L2CAP_CMD_HDR_SIZE 4
219 struct l2cap_cmd_rej_unk {
223 struct l2cap_cmd_rej_mtu {
228 struct l2cap_cmd_rej_cid {
234 struct l2cap_conn_req {
239 struct l2cap_conn_rsp {
246 /* protocol/service multiplexer (PSM) */
247 #define L2CAP_PSM_SDP 0x0001
248 #define L2CAP_PSM_RFCOMM 0x0003
249 #define L2CAP_PSM_3DSP 0x0021
251 /* channel identifier */
252 #define L2CAP_CID_SIGNALING 0x0001
253 #define L2CAP_CID_CONN_LESS 0x0002
254 #define L2CAP_CID_A2MP 0x0003
255 #define L2CAP_CID_ATT 0x0004
256 #define L2CAP_CID_LE_SIGNALING 0x0005
257 #define L2CAP_CID_SMP 0x0006
258 #define L2CAP_CID_DYN_START 0x0040
259 #define L2CAP_CID_DYN_END 0xffff
260 #define L2CAP_CID_LE_DYN_END 0x007f
262 /* connect/create channel results */
263 #define L2CAP_CR_SUCCESS 0x0000
264 #define L2CAP_CR_PEND 0x0001
265 #define L2CAP_CR_BAD_PSM 0x0002
266 #define L2CAP_CR_SEC_BLOCK 0x0003
267 #define L2CAP_CR_NO_MEM 0x0004
268 #define L2CAP_CR_BAD_AMP 0x0005
269 #define L2CAP_CR_AUTHENTICATION 0x0005
270 #define L2CAP_CR_AUTHORIZATION 0x0006
271 #define L2CAP_CR_BAD_KEY_SIZE 0x0007
272 #define L2CAP_CR_ENCRYPTION 0x0008
274 /* connect/create channel status */
275 #define L2CAP_CS_NO_INFO 0x0000
276 #define L2CAP_CS_AUTHEN_PEND 0x0001
277 #define L2CAP_CS_AUTHOR_PEND 0x0002
279 struct l2cap_conf_req {
285 struct l2cap_conf_rsp {
292 #define L2CAP_CONF_SUCCESS 0x0000
293 #define L2CAP_CONF_UNACCEPT 0x0001
294 #define L2CAP_CONF_REJECT 0x0002
295 #define L2CAP_CONF_UNKNOWN 0x0003
296 #define L2CAP_CONF_PENDING 0x0004
297 #define L2CAP_CONF_EFS_REJECT 0x0005
299 /* configuration req/rsp continuation flag */
300 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001
302 struct l2cap_conf_opt {
307 #define L2CAP_CONF_OPT_SIZE 2
309 #define L2CAP_CONF_HINT 0x80
310 #define L2CAP_CONF_MASK 0x7f
312 #define L2CAP_CONF_MTU 0x01
313 #define L2CAP_CONF_FLUSH_TO 0x02
314 #define L2CAP_CONF_QOS 0x03
315 #define L2CAP_CONF_RFC 0x04
316 #define L2CAP_CONF_FCS 0x05
317 #define L2CAP_CONF_EFS 0x06
318 #define L2CAP_CONF_EWS 0x07
320 #define L2CAP_CONF_MAX_SIZE 22
322 struct l2cap_conf_rfc {
326 __le16 retrans_timeout;
327 __le16 monitor_timeout;
331 #define L2CAP_MODE_BASIC 0x00
332 #define L2CAP_MODE_RETRANS 0x01
333 #define L2CAP_MODE_FLOWCTL 0x02
334 #define L2CAP_MODE_ERTM 0x03
335 #define L2CAP_MODE_STREAMING 0x04
337 /* Unlike the above this one doesn't actually map to anything that would
338 * ever be sent over the air. Therefore, use a value that's unlikely to
339 * ever be used in the BR/EDR configuration phase.
341 #define L2CAP_MODE_LE_FLOWCTL 0x80
343 struct l2cap_conf_efs {
352 #define L2CAP_SERV_NOTRAFIC 0x00
353 #define L2CAP_SERV_BESTEFFORT 0x01
354 #define L2CAP_SERV_GUARANTEED 0x02
356 #define L2CAP_BESTEFFORT_ID 0x01
358 struct l2cap_disconn_req {
363 struct l2cap_disconn_rsp {
368 struct l2cap_info_req {
372 struct l2cap_info_rsp {
378 struct l2cap_create_chan_req {
384 struct l2cap_create_chan_rsp {
391 struct l2cap_move_chan_req {
396 struct l2cap_move_chan_rsp {
401 #define L2CAP_MR_SUCCESS 0x0000
402 #define L2CAP_MR_PEND 0x0001
403 #define L2CAP_MR_BAD_ID 0x0002
404 #define L2CAP_MR_SAME_ID 0x0003
405 #define L2CAP_MR_NOT_SUPP 0x0004
406 #define L2CAP_MR_COLLISION 0x0005
407 #define L2CAP_MR_NOT_ALLOWED 0x0006
409 struct l2cap_move_chan_cfm {
414 #define L2CAP_MC_CONFIRMED 0x0000
415 #define L2CAP_MC_UNCONFIRMED 0x0001
417 struct l2cap_move_chan_cfm_rsp {
422 #define L2CAP_IT_CL_MTU 0x0001
423 #define L2CAP_IT_FEAT_MASK 0x0002
424 #define L2CAP_IT_FIXED_CHAN 0x0003
427 #define L2CAP_IR_SUCCESS 0x0000
428 #define L2CAP_IR_NOTSUPP 0x0001
430 struct l2cap_conn_param_update_req {
434 __le16 to_multiplier;
437 struct l2cap_conn_param_update_rsp {
441 /* Connection Parameters result */
442 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
443 #define L2CAP_CONN_PARAM_REJECTED 0x0001
445 #define L2CAP_LE_MAX_CREDITS 10
446 #define L2CAP_LE_DEFAULT_MPS 230
448 struct l2cap_le_conn_req {
456 struct l2cap_le_conn_rsp {
464 struct l2cap_le_credits {
469 /* ----- L2CAP channels and connections ----- */
470 struct l2cap_seq_list {
477 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF
478 #define L2CAP_SEQ_LIST_TAIL 0x8000
481 struct l2cap_conn *conn;
482 struct hci_conn *hs_hcon;
483 struct hci_chan *hs_hchan;
520 __u16 retrans_timeout;
521 __u16 monitor_timeout;
530 unsigned long conf_state;
531 unsigned long conn_state;
541 __u16 expected_ack_seq;
542 __u16 expected_tx_seq;
544 __u16 srej_save_reqseq;
545 __u16 last_acked_seq;
547 __u16 unacked_frames;
551 struct sk_buff *sdu_last_frag;
560 __u32 local_sdu_itime;
562 __u32 local_flush_to;
567 __u32 remote_sdu_itime;
568 __u32 remote_acc_lat;
569 __u32 remote_flush_to;
571 struct delayed_work chan_timer;
572 struct delayed_work retrans_timer;
573 struct delayed_work monitor_timer;
574 struct delayed_work ack_timer;
576 struct sk_buff *tx_send_head;
577 struct sk_buff_head tx_q;
578 struct sk_buff_head srej_q;
579 struct l2cap_seq_list srej_list;
580 struct l2cap_seq_list retrans_list;
582 struct list_head list;
583 struct list_head global_l;
586 const struct l2cap_ops *ops;
593 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
594 int (*recv) (struct l2cap_chan * chan,
595 struct sk_buff *skb);
596 void (*teardown) (struct l2cap_chan *chan, int err);
597 void (*close) (struct l2cap_chan *chan);
598 void (*state_change) (struct l2cap_chan *chan,
600 void (*ready) (struct l2cap_chan *chan);
601 void (*defer) (struct l2cap_chan *chan);
602 void (*resume) (struct l2cap_chan *chan);
603 void (*suspend) (struct l2cap_chan *chan);
604 void (*set_shutdown) (struct l2cap_chan *chan);
605 long (*get_sndtimeo) (struct l2cap_chan *chan);
606 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
607 unsigned long hdr_len,
608 unsigned long len, int nb);
609 int (*memcpy_fromiovec) (struct l2cap_chan *chan,
610 unsigned char *kdata,
616 struct hci_conn *hcon;
617 struct hci_chan *hchan;
622 __u8 fixed_chan_mask;
628 struct delayed_work info_timer;
630 struct sk_buff *rx_skb;
633 struct mutex ident_lock;
635 struct sk_buff_head pending_rx;
636 struct work_struct pending_rx_work;
638 struct work_struct id_addr_update_work;
642 struct l2cap_chan *smp;
644 struct list_head chan_l;
645 struct mutex chan_lock;
647 struct list_head users;
651 struct list_head list;
652 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
653 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
656 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
657 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
658 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
660 #define L2CAP_CHAN_RAW 1
661 #define L2CAP_CHAN_CONN_LESS 2
662 #define L2CAP_CHAN_CONN_ORIENTED 3
663 #define L2CAP_CHAN_FIXED 4
665 /* ----- L2CAP socket info ----- */
666 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
670 struct l2cap_chan *chan;
671 struct sk_buff *rx_busy_skb;
689 #define L2CAP_CONF_MAX_CONF_REQ 2
690 #define L2CAP_CONF_MAX_CONF_RSP 2
704 /* Definitions for flags in l2cap_chan */
713 FLAG_LE_CONN_REQ_SENT,
714 FLAG_PENDING_SECURITY,
718 /* Lock nesting levels for L2CAP channels. We need these because lockdep
719 * otherwise considers all channels equal and will e.g. complain about a
720 * connection oriented channel triggering SMP procedures or a listening
721 * channel creating and locking a child channel.
725 L2CAP_NESTING_NORMAL,
726 L2CAP_NESTING_PARENT,
731 L2CAP_TX_STATE_WAIT_F,
736 L2CAP_RX_STATE_SREJ_SENT,
738 L2CAP_RX_STATE_WAIT_P,
739 L2CAP_RX_STATE_WAIT_F,
743 L2CAP_TXSEQ_EXPECTED,
744 L2CAP_TXSEQ_EXPECTED_SREJ,
745 L2CAP_TXSEQ_UNEXPECTED,
746 L2CAP_TXSEQ_UNEXPECTED_SREJ,
747 L2CAP_TXSEQ_DUPLICATE,
748 L2CAP_TXSEQ_DUPLICATE_SREJ,
750 L2CAP_TXSEQ_INVALID_IGNORE,
754 L2CAP_EV_DATA_REQUEST,
755 L2CAP_EV_LOCAL_BUSY_DETECTED,
756 L2CAP_EV_LOCAL_BUSY_CLEAR,
757 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
761 L2CAP_EV_EXPLICIT_POLL,
762 L2CAP_EV_RECV_IFRAME,
771 L2CAP_MOVE_ROLE_NONE,
772 L2CAP_MOVE_ROLE_INITIATOR,
773 L2CAP_MOVE_ROLE_RESPONDER,
780 L2CAP_MOVE_WAIT_RSP_SUCCESS,
781 L2CAP_MOVE_WAIT_CONFIRM,
782 L2CAP_MOVE_WAIT_CONFIRM_RSP,
783 L2CAP_MOVE_WAIT_LOGICAL_COMP,
784 L2CAP_MOVE_WAIT_LOGICAL_CFM,
785 L2CAP_MOVE_WAIT_LOCAL_BUSY,
786 L2CAP_MOVE_WAIT_PREPARE,
789 void l2cap_chan_hold(struct l2cap_chan *c);
790 void l2cap_chan_put(struct l2cap_chan *c);
792 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
794 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
797 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
799 mutex_unlock(&chan->lock);
802 static inline void l2cap_set_timer(struct l2cap_chan *chan,
803 struct delayed_work *work, long timeout)
805 BT_DBG("chan %p state %s timeout %ld", chan,
806 state_to_string(chan->state), timeout);
808 /* If delayed work cancelled do not hold(chan)
809 since it is already done with previous set_timer */
810 if (!cancel_delayed_work(work))
811 l2cap_chan_hold(chan);
813 schedule_delayed_work(work, timeout);
816 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
817 struct delayed_work *work)
821 /* put(chan) if delayed work cancelled otherwise it
822 is done in delayed work function */
823 ret = cancel_delayed_work(work);
825 l2cap_chan_put(chan);
830 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
831 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
832 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
833 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
834 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
835 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
836 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
838 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
843 return chan->tx_win_max + 1 - seq2 + seq1;
846 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
848 return (seq + 1) % (chan->tx_win_max + 1);
851 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
856 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
861 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
862 unsigned long hdr_len,
863 unsigned long len, int nb)
865 return ERR_PTR(-ENOSYS);
868 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
872 static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
876 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
880 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
885 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
889 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
893 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
897 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
901 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
906 static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan,
907 unsigned char *kdata,
911 /* Following is safe since for compiler definitions of kvec and
912 * iovec are identical, yielding the same in-core layout and alignment
914 struct kvec *vec = (struct kvec *)msg->msg_iov;
918 int copy = min_t(unsigned int, len, vec->iov_len);
919 memcpy(kdata, vec->iov_base, copy);
922 vec->iov_base += copy;
923 vec->iov_len -= copy;
931 extern bool disable_ertm;
933 int l2cap_init_sockets(void);
934 void l2cap_cleanup_sockets(void);
935 bool l2cap_is_socket(struct socket *sock);
937 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
938 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
940 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
941 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
943 struct l2cap_chan *l2cap_chan_create(void);
944 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
945 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
946 bdaddr_t *dst, u8 dst_type);
947 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
948 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
949 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
950 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
951 int l2cap_ertm_init(struct l2cap_chan *chan);
952 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
953 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
954 void l2cap_chan_del(struct l2cap_chan *chan, int err);
955 void l2cap_send_conn_req(struct l2cap_chan *chan);
956 void l2cap_move_start(struct l2cap_chan *chan);
957 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
959 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
961 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
962 void l2cap_conn_put(struct l2cap_conn *conn);
964 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
965 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
967 #endif /* __L2CAP_H */